2018 Ascot Buyer's Guide_compressed

THE BASICS // AIR SYSTEMS
Compressor Guide
15
SIZING AN AIR COMPRESSOR
1 List the types of pneumatic devices/equipment to be
used and how many will be used at the same time.
2 Add total of air volume (SCFM) required by pneumatic
tools being used. Utilize the chart below.
3 Add additional 25% to compensate for
airline leaks and pressure drops.
4 Identify the air compressor that will provide necessary SCFM. The
following professional electric 2-stage compressors provide the listed:
SCFM*
HP SCFM HP SCFM
5 HP 17.2 SCFM 15 HP 42 SCFM
7.5 HP 24 SCFM 25 HP 97 SCFM
10 HP 35 SCFM 30 HP 106 SCFM
5 Once the correct HP rating has been selected based on the
air volume requirements and voltage of compressor, you will
need to know the type of available electric service to determine
the need for a single phase or three phase compressor.
EXAMPLE
TOOLS BEING USED SCFM
Tire Changer
5.5 SCFM
1/2" Impact Wrench 3.5 SCFM
3/4" Impact Wrench 7.5 SCFM
Hydraulic Lift
6.0 SCFM
SUBTOTAL
22.5 SCFM
X 1.25%
TOTAL SCFM
28.125 SCFM
COMPRESSORS
SINGLE-STAGE
COMPRESSORS
TWO-STAGE
COMPRESSORS
INTERCOOLERS
LOAD FACTOR
PISTON
DISPLACEMENT
(PD)
MAGNETIC
STARTERS
AFTERCOOLERS/
DRYERS
AUTOMATIC
TANK DRAIN
LOW OIL SWITCH
*SCFM Ratings at Sea Level
Customer will need an air
compressor that produces
a minimum of 28.125 SCFM
@ 175 PSI. Customer will
need a 10 HP compressor
or two 5 HP compressors.
TERMINOLOGY: General Definitions
Machines for compressing air or gas from an initial
intake pressure to a higher discharge pressure.
Those machines in which compression from initial to final pressure
is completed in a single step or stage typically less than 100 PSI.
Those machines in which compressions from initial
to final pressure is completed in two distinct steps
or stages typically greater than 100 PSI.
Devices for removing the heat of compression of the air or gas
between consecutive states of multistage compressors.
The ratio of average compressor output during a period of
actual use to the continuous rated output of the machine.
Piston Displacement (PD) is determined by precisely measuring a
volume of air which has been raised to a specific pressure and is
expressed in conditions existing at the compressor discharge. This flow
rate is generally stated in terms of actual cubic feet per minute (CFM).
TERMINOLOGY: Accessories
Magnetic Starters provide thermal overload protection for
motors and are recommended for 3 HP and larger motors.
Aftercoolers/Dryers remove moisture from the
air line as air cools from compressor.
Automatic Tank Drain automatically removes water that
has accumulated in the compressor tank as air cools.
This switch prevents the air compressor from operating when oil is low.
COMPRESSOR SELECTION GUIDE
After listing all the air operated devices
to be supplied by the air compressor,
determine from the chart, pressure range
and volume of air required by each device.
The air compressor must maintain a
minimum pressure at least equal to the
highest of the pressure ranges. Always use
free air (CFM) and pressure (PSI) from the
nameplate on device or from manufacturer.
Free air figures in the table are averages
and should not be considered accurate for
any specific brand.
PSI TOOL CFM*
PORTABLE TOOLS
70-100 Air Filter Cleaner 3
70-100 Body Polisher 20
70-100 Body Sander 10
70-100 Brake Tester 4
70-100 Carbon Remover 3
90-100 Dusting Gun (Blow Gun) 3
70-100 Panel Cutter 4
70-90 Drill 1/16" - 3/8" 4
70-90 3/8" Impact Wrench 3
70-90 1/2" Impact Wrench 4
70-90 5/8" Impact Wrench 5
70-90 3/4" Impact Wrench 8
70-90 1" Impact Wrench 12
70-90 Die Grinder 5
90-100 Vertical Disc Sander 20
90-100 Small File/Saw Machine 3
90-100 Large File/Saw Machine 5
90-100 Tire Buffer 5
TIRE TOOLS
90-100 Hydraulic Lift 6
90-100 Paint Gun - Production 8
90-100 Paint Gun - Touch Up 4
125-150 Rim Stripper 6
125-150 Tire Changer 1
125-150 Tire Inflation Line 2
125-150 Tire Spreader 1
*Approximate CFM. Individual Equipment may Vary
AIR SYSTEMS // THE BASICS
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